code: def compiler():
      """Get compiler to use for C++ to binary process. The precedence for
      choosing the compiler is as follows::
  
        1. `CXX` environment variable
        2. User configuration (~/.pythranrc)
  
      Returns None if none is set or if it's set to the empty string
  
      """
      cfg_cxx = str(cfg.get("compiler", "CXX"))
      if not cfg_cxx:
          cfg_cxx = None
      return os.environ.get("CXX", cfg_cxx) or None
  
file_path: catboost/contrib/python/pythran/pythran/config.py
imports: import io
  import logging
  import os
  from shlex import split
  import sys
  import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: compiler() and returns: unknown